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Mubashaf smiled more ugly than crying and said, "Yu ...... Marshal Yu, how do you know the rules of our Muslim oath? ”

Yu Ming looked puzzled and said, "I just learned about this custom by chance from a big food merchant. In fact, why did Lord Mubashaf have such an ugly face! This oath was made by us together, and if we break it and receive Allah punishment and curse, you and I are both equal...... How? Could it be that Lord Mubashaf has a ghost in his heart and does not dare to swear? ”

Mubashaf was really forced to do nothing at this time, and he thought to himself, you are not a Muslim, and if you swear according to the Qur'an that if you do not fulfill the agreement, Allah will not necessarily punish you, and I will be miserable.

But in this case, he can't say that I just didn't plan to fulfill the agreement.

Yu Ming saw that his face was blue and white for a while, and knew that he was hesitating, so he struck while the iron was hot, but his tone was still flat: "Lord Mubashaf has to think clearly, as long as you get the answer to this question, you will not only be able to support King Basar to ascend the throne and become a meritorious person." Maybe he can soar to the sky because of this, become the prime minister of the big food country, and hold the power of a country...... Moreover, you will also be the first wise man in a few years to answer the question of His Majesty the Caliph, and it will not be difficult for you to go down in the annals of the Great Food Country......"

Yuming's words finally moved Mubashaf's heart and contributed to his determination to fulfill the contract.

Mubashaf gritted his teeth and said, "Okay! Marshal Yu, I agreed! ”

After that, he pressed the Qur'an with his hand and swore solemnly: "Allah Allah, I, Mubashaf, hereby swear that if Yuming can really answer the question raised by His Majesty the Caliph, find the fifth perfect number." Within two years, I will send Yu Ming a fine Arabian horse, twenty male and twenty female, and at the same time provide him with the refining technology of Damascus black steel knives! If you break this oath, may Allah be punished with all the punishment and your children become slaves of the devil! ”

Seeing this, Yu Ming admired his piety, and although he did not believe in Allah Allah at all, he also pretended to put his hand on the Qur'an and made a similar vow.

After taking the oath, Mubashaf asked impatiently: "Marshal Yu, you should tell the answer!" ”

"Hmmm! The fifth perfect number is 33550336! Yu Ming said lightly.

"Such a large number?" Mubashaf was also stunned when he heard this.

"Yes! That's why the wise men of your country have never been found! Yu Ming nodded and said, "If you don't believe it, you can break down the factors and check them to see if it's really a perfect number!" ”

After Mubashaf and Usa glanced at each other, Fang slowly said, "Although we believe in Marshal Yu's wisdom, it is more reassuring to check it!" ”

"Good! Check it slowly! I'm also going to prepare to lead an expedition against the Turks, which can be regarded as a sign of our alliance! Yu Ming waved his hand.

Mubashaf and Usa were also anxious and wanted to quickly check if 33550336 number was perfect. He immediately bowed, then withdrew.

And after Mubashaf and the others left, Zhou Qiangfang couldn't wait to say: "Marshal, I found that Mubashaf and the Arab sailing ship they were on were very good!" I'm very inspired especially when it comes to sail design, I don't know if you can talk to him about it and let me get on their boat and take a look and study it! ”

Only then did Yu Ming understand why Zhou Qiang wanted to bring Mubashaf to see him so much, and the emotional drunkard did not mean to drink.

"It's okay, you don't need me to say, you can find him yourself! Tell him plainly: If you can't help but feel free to treat us as friends, then don't think about me dealing with the Turks! As long as Mubashaf is not an idiot, he knows how to decide. He will never make things difficult for you on such a small issue! Yu Ming said nonchalantly.

"That's it! Then I'll go tell him right away! When Zhou Qiang heard this, he was overjoyed, and immediately ran out of the hall and chased after Mubashaf, who had not gone far.

And the subsequent situation was just as Yuming expected, Mubashaf could not have made things difficult for Zhou Qiang in such a trivial matter, but he devoted himself to verifying whether the number of 33550336 was perfect. After listening to Zhou Qiang's stammering words, he waved his big hand and said, "Lord Zhou, you can go anywhere on my ship, let alone just on the deck." It's okay to research as much as you want. ”

Zhou Qiang, who had obtained Mubashafken, was overjoyed, and when he took a group of craftsmen on the Arab sailing ship, he began to study it carefully.

Only a few days later, Zhou Qiang rushed to find Yu Ming again, his expression was very nervous, his hands kept rubbing, and there was an expression on his face that wanted to say something.

Yu Ming smiled and ordered Guo Yi to move a chair and let him sit down. At the same time, two maids also came forward and served them tea.

"Lord Zhou, you can taste it, this is green tea from Jiangdu, it tastes sweet, very delicious, and it is not easy to buy it in Liaodong." Yu Ming said with a smile.

Tea and a smile are the melting agents to dissolve people's hearts, and after Zhou Qiang drank a cup of tea that exuded a rich fragrance, his expression was much more relaxed than just now.

Zhou Qiang took a sip of tea at this time, and then said, "Does Marshal Yu know my situation at the Dengzhou Shipyard?" ”

Yu Ming shook his head and said, "Lord Zhou, I really don't know this!" ”

Zhou Qiangfang sighed: "In the eyes of the shipyard craftsmen I am with, I am a completely strange person. Because I am not like others, I spend my energy and time on how to please a few directors of the shipyard, and only focus on manufacturing technology. In addition, he is not good at socializing and does not have a lot of personal accidents, so he has been squeezed out in the shipyard. At one point, I proposed an improvement that would allow for a significant increase in the load capacity of the vessel without affecting the speed. But I was still scolded by the principal, saying that I was talking on paper, and it was impossible to do it...... But my character is very stubborn, insisting that this improvement measure is effective, and asking the director to pay for the development, so I offend the director and the general manager......"

Yu Ming also cried and laughed a little after hearing this, the feeling that Zhou Qiang does have two brushes in technical research, but in terms of dealing with people, it is not ordinary, it is really a bit of an accident that does not understand human feelings, and it is indeed not suitable for mixing in officialdom.

However, Yu Ming naturally didn't have the same knowledge as him, so he asked with some curiosity: "I don't know what improvement measures you proposed to make the director of Dengzhou Shipyard so angry?" ”

Zhou Qiang saw that Yuming seemed to be a little interested in his research results, and his spirits were immediately lifted, and he immediately said: "In fact, as early as a few years ago, I saw the sea ships that drove from Dashi, and I felt that their Awei Bo sailing ships were all soft sails, while our Da Sui sea ships were all hard sails. Although the comprehensive efficiency of the hard sail is high, it can rotate around the mast, and even completely use the wind in all directions, the utilization rate of the wind power of the hard sail and the soft sail per unit area is much greater than that of the soft sail, but because the heavy weight of the hard sail is too heavy, the larger the sail, the heavier the sail, and the sail on some large ships is even 'not a few people can move'......"

Speaking of this, his mouth was a little dry, and after taking a sip of tea, he continued: "There is another disadvantage of the hard sail, that is, because the whole sail is lifted, the area cannot be large, otherwise people will not be able to pull it. The height of the mast should not be high, otherwise the strength of the mast will be affected, so I went to Mubashaf's ship in the past two days and asked the sail operator on his ship in detail to understand the characteristics of the soft sails......"

"I've found that if you use a soft sail, the efficiency per unit area is comparable to our hard sail when downwind, and because of its light weight, the soft sail can be made very large, so the thrust you can get when you are downwind is much higher than that of the hard sail, and you can drive larger boats. Even when headwinds are taken into account, speed has a clear advantage, especially for speed limits...... And the improvement measure I proposed is to change the hard sails on our Great Sui warships and the soft sails of the Great Diet Sailboat...... The advantages of the two are combined......"

What he said was all professional terms, and Yu Ming listened to it like falling into the clouds, especially when he said that the use of angle sails and then the use of Yanfan to solve the problem of low efficiency of the crosssail under crosswind, it was like listening to the book of heaven.

"Stop! Stop! Yu Ming finally couldn't bear it anymore and terminated the words of the director Zhou, who was obsessed with shipbuilding.

"Lord Zhou, I will fully support you about improving the sails! How much do you estimate it will cost? Yuming asked.

After Zhou Qiang heard this, he was immediately overjoyed and said: "The marshal finally agreed to make this new style of sail?" If we can make it, we will definitely be able to increase the speed of our ship to more than that! ”

"Hmmm! How much do you want me to allot? Yu Ming nodded and asked again.

"It's not much, and the investment is just a lot!" Zhou Qiang thought for a moment and said.

"So much? You can buy two big ships, and you can just make a few sails for so much money? Yu Ming exclaimed. When he was fighting against the Koreans, he also used the warships left behind by the Great Sui Navy many times, and naturally he was not a layman who knew nothing about the cost of ships.

Zhou Qiang shouted bitterly at this time: "Marshal, don't just look at a few pieces of cloth, it's a canvas cloth used on the ship!" They are not woven by ordinary looms, they must be made of tarpaulin, and the value is much higher than that of ordinary cloth. And the main thing is that these tarps have to be sewn up, and a mast has to be installed on the ship......"

"That's it! I understand, you can make this new type of sail for me with peace of mind! I'll give you the money! But you must not use it indiscriminately, and if I find out that you have self-enriching behavior, you can blame me for not being polite. Although Yu Ming felt that Zhou Qiang should not be the kind of person who would be corrupt, he still reminded him.

After Zhou Qiang heard this, he immediately said: "Marshal Yu, don't worry, if you find out that I am corrupt, you can immediately throw me into the sea to feed the fish!" ”

"Hmmm! Then you just let it go! Strive to get the new sails out sooner! Yuming encouraged.

At this time, he also understood why the director of the Dengzhou shipyard was very resentful of Zhou Qiang.

This is not only the reason for Zhou Qiang's incomprehensible accident. Instead, he actually proposed to replace the hard sails of the Great Sui warships with the soft sails used by the Dashi Sailing Ship, which in the eyes of the shipyard director with strong self-esteem, didn't he think that the shipbuilding technology of his shipyard was not as good as the Dashi? And the Great Sui now thinks that the Great Sui is an advanced and powerful country in the world, with the best talents, and wants them to go to the technology of the Arabs, how can they afford to lose this face?

After Zhou Qiang happily retreated, Mubashaf followed. He also said happily: "Marshal Yu, I summoned all the people of the envoy group to calculate, and even paid a group of account gentlemen from the city to help. After days and nights, it was finally proved that the number 33550336 was indeed the fifth perfect number! Marshal, you've done me a great favor! Now I can make a great contribution to His Highness Basar! ”

After Yu Ming heard this, he was not so excited, because he had long known that this was the result without suspense. The only thing I am worried about is that Mubashaf has miscalculated. But now it seems that this big beard is still right.

"Master Mubashaf, you and I are friends, and friends should help each other!" Yu Ming said with a smile. He also had to say something hypocritical.

"Marshal Yu, thank you so much this time! I'll leave for China in a few days, and this time I'll be bidding you farewell. Mubashaf knew that this was just an exchange of interests between the two, but he was still very excited.

He clenched Yuming's hand and said, "Marshal, you can rest assured!" After I return to Dashi, I will arrange for a caravan to send you as soon as possible to bring you the smelting technology of the war horse and the Damascus black steel knife! If you help me, I will repay the favor and never break my word! ”

Yuming nodded, and after the two exchanged pleasantries for a while, Mubashaf said goodbye and left.

After dealing with these miscellaneous things, Yuming also devoted himself to the training and preparation of the army. The logistics organization of the Liaodong camp also began to operate under the command of the eldest grandson, and it was equipped with grain, grass, weapons, war horses and armor for the upcoming army.

More than a month later, when the ice and snow outside the fortress began to melt, the envoys sent from the eastern capital also arrived. He brought the latest decree of the imperial court: Yang Guang decided to lead an army of 500,000 troops, divided into five, and personally conquer the Turks. The task assigned by Yang Guang to Yuming was to ask Liaodong to raise a large army, attack the steppe from the flank, and after copying the Turks, first eliminate Tiele, Murowei, Xue Yantuo and other tribes that had defected to the Turks, and then raid the Eastern Turkic tent, and the imperial army to attack from the north and south, annihilate the main force of the Turks, and strive to sweep away this great trouble in the north of the Sui Dynasty in a war.

Yu Ming set up the incense table, made a lot of effort in front of the messenger, and respectfully accepted the holy decree.

Subsequently, he said to the generals: "I have raised troops in Liaodong for a thousand days, and I have used troops for a while, can I repay Your Majesty's Longen and make contributions to the Great Sui, so I will fight here!" Let's go back and get ready! Five days later, I will swear to go west! ”

(End of Volume 1)

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